15-MINUTE ENGLISH TEST NO.1 (UNIT 7)

I. Find the word which has a different sound in the underlined part.

1. A. affect                             B. algae                             C. aquatic                                    D. permanent

2. A. school                            B. cholera                          C. chemistry                               D. machine

3. A. litter                               B. visual                            C. light                                        D. radiation

4. A. radioactive                    B. pollution                       C. contaminate                           D. convey

5. A. fox                                 B. loss                                C. cholera                                   D. billboard

II. Write the correct word under each picture. The first letter is given as a clue.

15-MINUTE ENGLISH TEST N0.2 (UNIT 7)

I. Write the correct word under each picture. The first letter is given as a clue.

II. Find the word which has a different stress from the others.

1. A. pollutant                        B. untreated                       C. permanent                              D. aquatic

2. A. affect                             B. poison                           C. thermal                                   D. visual

3. A. litter                               B. effect                             C. earplug                                   D. groundwater

4. A. contaminate                   B. radiation                       C. pollution                                 D. untreated

5. A. pressure                         B. hearing                          C. litter                                        D. pollute

15-MINUTE ENGLISH TEST NO-3 (UNIT 7)

I. Choose the correct answer.

1. Do you know what is the cause ________ pollution?

     A. of                                   B. in                                   C. on D. for

2. My grandfather has to measure blood ________ every month.

     A. billboard                       B. pressure                         C. groundwater                           D. earplug

3 ______ pollution is harmful or annoying levels of noise, such as from vehicles, industry activities, etc.

     A. Light                             B. Visual                           C. Soil                                         D. Noise

4. Parents should teach children not to ________ wastes on the road.

     A. litter                              B. poison                           C. cause                                      D. measure

5. She can’t hear your voice ________ she’s wearing earplugs.

     A. although                        B. due                                C. because                                   D. however

II. Choose the letter A, B, C or D to complete the passage below.

Water pollution happens ________ (1) toxic substances enter water bodies such as lakes, rivers, oceans and so on, getting dissolved in them, lying suspended in the water or depositing on the bed. This degrades the quality of water. Not ________ (2) does this spell disaster for aquatic ecosystems, but the pollutants also seep through and reach the groundwater, which might end up in our households as contaminated water we use in our daily activities, including drinking.

Water pollution can be ________ (3) in a number of ways, one of the most polluting being city sewage and industrial waste discharge. Indirect sources ________ (4) water pollution include contaminants that enter the water supply from soils or groundwater systems and from the atmosphere via rain. Soils and groundwater contain ________ (5) residue of human agricultural practices and also improperly disposed of industrial wastes.

Pollutants can be of varying kinds: organic, inorganic, radioactive and so on. In fact, the list of possible water contaminants is just too vast to be listed here.

1. A. what                               B. when                             C. why                                         D. while

2. A. only                               B. both                               C. well                                        D. either

3. A. cause                              B. causing                          C. causes                                     D. caused

4. A. of                                   B. in                                   C. at                                            D. for

5. A. a                                     B. an                                  C. the                                          D. x

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